Examination of physical properties of final product and drying properties of combined (convective pre-drying and freeze finish-drying) dehydration method

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dc.contributor.authorAntal, Tamás
dc.date.accessioned2021-06-28T10:53:56Z
dc.date.available2021-06-28T10:53:56Z
dc.date.issued2014-03-11
dc.description.abstractIn this study, the effects of freeze drying (FD), hot-air drying (HAD) and combined drying (HAD-FD) on drying characteristics, energy uptake, texture, rehydration and color of carrot were investigated. Results showed that HAD-FD significantly improved the drying time compared with FD under the same operating conditions, and the HAD-FD can reduce the total cost of dehydration. The drying kinetics was described by the Henderson-Pabis and the third degree polynomial models in the case of HAD, FD and HAD-FD. The HAD carrot samples were exhibited shrinkage, case hardening, poor rehydration and brown surface. The FD carrot cubes appeared porous structure, excellent rehydration, soft texture and loose color. The HAD-FD samples were superior to HAD products and was nearer in quality to FD products with respect to appearance, rehydration and surface resistance (texture). Finally, it is concluded that HAD-FD is effective in improving the FD drying rate. However, the combined drying has a small-scale adverse effect on product quality.en
dc.formatapplication/pdf
dc.identifier.citationActa Agraria Debreceniensis, No. 56 (2014) , 5-12
dc.identifier.doihttps://doi.org/10.34101/actaagrar/56/1924
dc.identifier.issn2416-1640
dc.identifier.issue56
dc.identifier.jatitleActa agrar. Debr.
dc.identifier.jtitleActa Agraria Debreceniensis
dc.identifier.urihttps://hdl.handle.net/2437/315799en
dc.languageen
dc.relationhttps://ojs.lib.unideb.hu/actaagrar/article/view/1924
dc.rights.accessOpen Access
dc.subjectcombined dryingen
dc.subjectfreeze dryingen
dc.subjectconvective dryingen
dc.subjectdrying kineticsen
dc.subjectenergy consumptionen
dc.subjecttextureen
dc.subjectrehydrationen
dc.subjectcoloren
dc.titleExamination of physical properties of final product and drying properties of combined (convective pre-drying and freeze finish-drying) dehydration methoden
dc.typefolyóiratcikkhu
dc.typearticleen
dc.type.detailedidegen nyelvű folyóiratközlemény hazai lapbanhu
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